DOI: 10.1175/JCLI-D-15-0239.1
Scopus记录号: 2-s2.0-84964869690
论文题名: "El Niño Like" hydroclimate responses to last millennium volcanic eruptions
作者: Stevenson S. ; Otto-Bliesner B. ; Fasullo J. ; Brady E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 8 起始页码: 2907
结束页码: 2921
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Climate change
; Drought
; Fighter aircraft
; Nickel
; Tropics
; Volcanoes
; Climate variability
; ENSO
; Intertropical convergence zone
; Paleoclimates
; Southern oscillation
; Teleconnection patterns
; Teleconnections
; Western United States
; Climatology
; climate variation
; climatology
; drought
; El Nino
; El Nino-Southern Oscillation
; hydrological cycle
; hydrometeorology
; paleoclimate
; teleconnection
; volcanic eruption
英文摘要: The hydroclimate response to volcanic eruptions depends both on volcanically induced changes to the hydrologic cycle and on teleconnections with the El Niño-Southern Oscillation (ENSO), complicating the interpretation of offsets between proxy reconstructions and model output. Here, these effects are separated, using the Community Earth System Model Last Millennium Ensemble (CESM-LME), by examination of ensemble realizations with distinct posteruption ENSO responses. Hydroclimate anomalies in monsoon Asia and the western United States resemble the El Niño teleconnection pattern after "Tropical" and "Northern" eruptions, even when ENSO-neutral conditions are present. This pattern results from Northern Hemisphere (NH) surface cooling, which shifts the intertropical convergence zone equatorward, intensifies the NH subtropical jet, and suppresses the Southeast Asian monsoon. El Niño events following an eruption can then intensify the ENSO-neutral hydroclimate signature, and El Niño probability is enhanced two boreal winters following all eruption types. Additionally, the eruption-year ENSO response to eruptions is hemispherically dependent: The winter following a Northern eruption tends toward El Niño, while Southern volcanoes enhance the probability of La Niña events and Tropical eruptions have a very slight cooling effect. Overall, eruption-year hydroclimate anomalies in CESM disagree with the proxy record in both Southeast Asia and North America, suggesting that model monsoon representation cannot be solely responsible. Possible explanations include issues with the model ENSO response, the spatial or temporal structure of volcanic aerosol distribution, or data uncertainties. © 2016 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49968
Appears in Collections: 气候变化事实与影响
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作者单位: Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Stevenson S.,Otto-Bliesner B.,Fasullo J.,et al. "El Niño Like" hydroclimate responses to last millennium volcanic eruptions[J]. Journal of Climate,2016-01-01,29(8)